Class 12 Exam > Class 12 Questions > Which of the following statements is false?a)...
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Which of the following statements is false?
- a)Salt water decelerates the rate of corrosion
- b)Magnesium is more active than iron
- c)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosion
- d)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engine
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which of the following statements is false?a)Salt water decelerates th...
Saline medium has extra salts such as sodium chloride dissolved in water. It has a greater concentration of electrolyte than ordinary medium. The ions present will favour the formation of more electrochemical cells and favour the transfer of hydrogen ions and will thus promote rusting or corrosion.
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Which of the following statements is false?a)Salt water decelerates th...
False statement: Salt water decelerates the rate of corrosion
Explanation:
- Corrosion is the process in which metals react with substances in the environment, such as oxygen and water, leading to their deterioration and loss of structural integrity.
- Saltwater is actually more corrosive than pure water because it contains dissolved salts, primarily sodium chloride (NaCl).
- When metal is exposed to saltwater, it enhances the corrosion process due to the presence of ions in the solution, which increases the electrical conductivity and accelerates the rate of corrosion.
- The ions in saltwater provide a pathway for the flow of electrons, creating a galvanic cell or battery-like setup, which leads to accelerated metal corrosion.
- This process is known as galvanic corrosion, and it occurs when two dissimilar metals are in contact with an electrolyte, such as saltwater.
- In the galvanic cell, the more active metal (such as magnesium) acts as an anode and undergoes oxidation, while the less active metal (such as iron) acts as a cathode and undergoes reduction.
- This leads to the accelerated corrosion of the anode (magnesium) and the protection of the cathode (iron), resulting in the degradation of the more active metal.
- Therefore, statement a) "Saltwater decelerates the rate of corrosion" is false because saltwater actually accelerates the rate of corrosion due to the presence of ions, leading to galvanic corrosion.
Explanation:
- Corrosion is the process in which metals react with substances in the environment, such as oxygen and water, leading to their deterioration and loss of structural integrity.
- Saltwater is actually more corrosive than pure water because it contains dissolved salts, primarily sodium chloride (NaCl).
- When metal is exposed to saltwater, it enhances the corrosion process due to the presence of ions in the solution, which increases the electrical conductivity and accelerates the rate of corrosion.
- The ions in saltwater provide a pathway for the flow of electrons, creating a galvanic cell or battery-like setup, which leads to accelerated metal corrosion.
- This process is known as galvanic corrosion, and it occurs when two dissimilar metals are in contact with an electrolyte, such as saltwater.
- In the galvanic cell, the more active metal (such as magnesium) acts as an anode and undergoes oxidation, while the less active metal (such as iron) acts as a cathode and undergoes reduction.
- This leads to the accelerated corrosion of the anode (magnesium) and the protection of the cathode (iron), resulting in the degradation of the more active metal.
- Therefore, statement a) "Saltwater decelerates the rate of corrosion" is false because saltwater actually accelerates the rate of corrosion due to the presence of ions, leading to galvanic corrosion.
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Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer?.
Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements is false?a)Salt water decelerates the rate of corrosionb)Magnesium is more active than ironc)During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosiond)Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engineCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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